Honing device



Patented Mar. 17, 1942 A HONIN G DEVICE 'Kirke W. Connor, Detroit,Mich., assignor to Micromatic Hone Corporation, Detroit, Mich. acorporation of Michigan Application May 5, 1939, Serial No. 271,843

3 Claims.

This application is a continuation in part of my application, Serial No.76,520, filed April 27, 1936, which issued as Patent No. 2,200,573, onMay 14, 1940, and relates to honing methods and apparatus, andparticularly to a honing method and device which employs a singleabrading element which is rapidly oscillated and advanced relative to asurface to be honed to produce an accurate and highly polished surface.

In my Patent No. 2,108,029, dated February 8,

- 1938, and assigned to the assignee of the present invention, a methodand apparatus are disclosed wherein a plurality of honing elements arerapidly reciprocated in timed relation to the speed of rotation of thetool to produce .a predetermined angular intersection of the paths ofabrasion during the time the tool and work are fed relative to eachother. Certain features embodied in the invention of the above mentionedapplication appear in the present invention.

In the present invention a single honing element is employed whicheliminates any binding anduneven wear on the stones which may occur whena plurality of the stones are employed in a single tool. It issubstantially impossible to grade the abrading stones relative'tovhardness so that when a group of stones are employed, a

the wearing qualities of some are materially greater than those of.others and, as a result, certainstones wear faster than others, causinga binding between the stones when depending upon each other for supportwithin the work piece and uneven wearing of the stones.

Due to the rapid oscillation of the honing stone, a method of grindingis provided which simulates that of hand polishing wherein the hand israpidly oscillated to move an abrading element over the surface to behoned. A feed movement is introduced between the oscillating stone andthe work to extend the abrading op eration uniformly over the surface.

Accordingly, the main objects of my invention are; to provide a methodwhereby an abrading stone is rapidly oscillated during the time a feedmovement is provided between the work and the stone; to provide rapidreciprocation of a single honing element having an engaging surfacecongruent to that of the work and advancing the work and honing stonerelative to each other to v cover the entire surface to be finished; toprovide a tiltable spindle having a single expansible abrading elementthereon projecting into a work piece to contact the tapered surface of acylindrical element through adjustment of the support for the spindleand reciprocating the spindle and rotating the work piece in timedrelation with each other; and in general, to provide apparatus foraccurately machining surfaces to a high mirror finish, which is simplein construction, positive in operation and economical of manufacture.

Other objects and features of novelty of my invention will be eitherspecifically pointed out or will become apparent when referring, for abetter understanding of my invention, to the following description takenin conjunction with the following drawing, wherein:

Figure 1 is a view partially in section and partially in elevation ofstructure embodying features of my invention; and

Fig. 2 is a wiring diagram which may be em Q ployed for controlling theoperation of the motors illustrated in Fig. 1.

' In Fig. 1 I have illustrated the principles above set forth, that ofrapidly oscillating a honing stone and providing a feed between thestone and work surface during such rapid oscillation, as embodied in adevice adapted to hone conical objects. The work piece is illustrated asbeing a conical race- I of a bearing which is supported in a holder 8 ona shaft 9 driven through a gear II. The gear ll may be driven throughsuitable pinions 6, by a motor III, the speed of which may be regulatedas pointed out hereinafter. The honing stone I2 is supported in aspindlel3, spring pressed outwardly; fromthe axis .of the spindle. The spindleis supported for reciprocation in a boss [4, and is keyed thereto by akey I l5 to prevent rotation of the spindle relative to A head I6 isprovided on the end of the spindle, being urged toward a cam H by a theboss.

spring l8. The cam I'I is.carried on a shaft IQ of a motor 2|, the speedof which is adjustable.

The boss I4 and motor 2| are mounted on a car- M riage 22 which isshiftable upon a table 23 by suitable means herein illustrated as a leadscrew 24. The table 23 is tiltable relative to the table 25 on which thework support 8 is secured through a hinge 26 which interconnects thetables. A clamping nut 21 retains the table in position and through a.quadrant 28 provides indicating means for setting off the relative angleof slope. The carriage 22 is retracted to have the stone l2 disengagethe work piece I so that it may be removed and a new work piece'insertedwithin the support 8. Thereafter the carriage 22 is advanced to have thestone I2 engage the surface of the work piece I and to be biasedinwardly toward the axis of the spindle l3 upon further advancement ofthe carriage. The operation'of the motor 2| causes the stone l2 toberapidly oscillated while the work piece I is rotated in predeterminedrelation to such oscillation.

Referring to Fig. 2, I have illustrated a wiring diagram wherein themotors I and 2| are disposed in series with rheostats 29 and switches 3|independently connecting the motors to a circuit. Through the adjustmentof one or both of the rheostats the motors I0 and 2| may be changed inspeed to vary the relative movement in reciprocation and rotation of thestone and work piece to thereby change the angle of crossing of theresulting scratch marks on the work piece surface. For various sizes ofwork pieces, for various types of metal and for different abrasivematerial, the angle of crossing of the scratch marks should be varied toproduce the desirable type of honing and finishing.

In the wiring diagram of Fig. 2, I have illustrated in conjunction withtherheostats 29, solenoids 32 which cut in a predetermined amount ofresistance when energized, to vary the speed of operation of the motors.The flow of current to the solenoids 32 is controlled by a time switch33, which may be employed to actuate both of the solenoids, orindividual time switches may be employed, one for each solenoid. Aspointed out above, the desirable angle of scratch marks employed in arough honing opmarks to produce a fine finish, while operatingergization of the solenoids through the operation of the time switch orswitches. The switch or switches are set to operate upon the completionof the rough honing operation which thereby changes the type of honingfrom that employed during the roughing operation to that desired for thefinishing operation. It therefore follows that I have illustrated ahoning device employing a single honing stick which is moved radiallyfrom a spindle while being retained in fixed relation thereto. Thespindle oscillates the stone across the tapered surface of a cylindricalwork piece. the angle of thestone being. adjusted to that of the taper.The spindle support has a pivotal connection and is locked in positionby means of a quadrant, the scale of which checks the position of thestone. The work piece is rotated during the oscillation of the abradingstone while the abrading stone is fed parallel to the path ofoscillation of the stone. The compound movement thus provided betweenthe stone and the surface to be finished to accurate dimension may bevaried byregulating the speed of the motors driving the'abrading stonein reciprocation and the work piece in rotation. A setting may bearranged by which the change from one speed of relative movement toanother may occur between two different phases of operation, that ofrough honing and that of home finishing a surface. i

While I have described and illustrated but a single embodiment of myinvention, it will be apparent to those skilled in the art, that variouschanges, omissions, additions, and substitutions may be made thereinwithout departing from the spirit and scope of my invention as set forthin the accompanying claims.

What I claim is:

1. A honing device for machining a tapered surface including, incombination, a base, a sup-' port for a workpiece, means for rotatingsaid support, a honing tool, a support for said honing tool. hinged tosaid base and adjustable for pcsitioningthe slope of the honing tool, atable on 1 said support on which the honing tool is mounted movabletoward and away from said worksupport, means on said table forreciprocating said tool, and a stone in said honing tool spring pressedoutwardly against the surface of the workpiece to be honed.

2. A honing device for machining a tapered surface including. incombination, a base, a support for a workpiece on said base, means forrotating said support, a honingtool, an angularly adjustable support forsaid honing tool for positioning the slope thereof relative to thetapered surface of the workpiece, a table on said support on which thehoning tool is mounted for movement toward and away from said worksupport, means on said table for reciprocating said tool, a honing stonein said honing tool, and means for urging said honing stone outwardly ofsaid tool against the surface of the workpiece to be honed.

3. A honing device for machining a tapered surface including, incombination, a base, a support for a workpiece on said base, means forrotating said support, a honing tool, an angularly adjustable supportfor said honing tool for positioning the slope thereof relative to thetapered surface of the workpiece, a table on said support on which thehoning tool is mounted for movement toward and away from said worksupport, means on said table for reciprocating said tool, a honing stonein said honing tool, means for urging said honing stone outwardly ofsaid tool against the surface of the workpiece to be speed of theworkpiece in rotation and the abrasive stone in reciprocation.

KIRKE W. CONNOR.

